A Full walkthrough for this addon can be found HERE

Includes an FAQ and search feature, so you can try to find anything you may need help with.

• Import and export 3MF Core Specification v1.4.0
• Correct ZIP / OPC package structure
• Proper handling of units, build items, and object hierarchies
• Robust parsing with recovery-oriented import behavior

• Multi-object and multi-build support
• Linked duplicates (Alt+D) export efficiently as shared components (smaller files), and re-import as linked duplicates
• Optional modifier application on export
• Selection-only and hidden-object export options (with clear warnings when things are skipped)
• Configurable coordinate precision

• Drag & drop .3mf files directly into Blender’s viewport (with a quick options popup)
• Flexible import placement (keep original / world origin / 3D cursor, with origin placement options)
• Choose to keep the objects extracted location, place at world origin, or place at your 3d cursor.

• Full support for Base Materials (basematerials) extension
• Full support for PBR materials (metallic, specular, and translucent workflows)
• Textured PBR support for base color / roughness / metallic maps (with textures brought along in the 3MF)
• Face-level color preservation via Blender materials
• Stable color round-tripping across import/export cycles
• Smarter material reuse on re-import (reduces duplicate materials)

• Import and edit slicer multi-material paint data directly in Blender
• Automatic UV map generation for objects lacking proper mapping
• Built-in painting tools for filament assignment
• User-defined filament count and color selection

• Bake textures, PBR materials, or procedural shaders into discrete filament colors

• HSL conversion and quantization to a user-defined palette

• Export slicer-ready triangle data compatible with multi-material workflows

This part of the add-on can take some help, if you find you need some please read this part of the guide: https://www.clonecore.net/docs/3mf-guide/mmu-painting

• Orca Slicer / BambuStudio

• Full round-trip support

• Multi-color (painted) zones preserved
• Filament colors read from and written to slicer metadata

• Production Extension multi-file structure supported

• PrusaSlicer

• Multi-material zones imported and preserved

• Compatible export for painted multi-material workflows
• Graceful handling of filament index–based color systems

• Embedded viewport thumbnail included in exported 3MF files
• Metadata preserved where possible across round trips
• Non-destructive handling of unknown or vendor-specific metadata
• Clear progress/status messages during import/export, with warnings designed to stay readable (no spam)

Can be reported here: https://github.com/Clonephaze/3MF-Blender-Add-on---Maintained/issues

Clonephaze (2025 - ): Current Maintainer https://www.clonecore.net/

Ghostkeeper (2020–2023): Original Blender 3MF add-on author https://github.com/Ghostkeeper